"We started a week ago," the 43-year-old Aussie said. "They've already taken my pants in three times."

Jackman, who once consumed 6,000 calories a day to beef up for his film role as Wolverine in the "X-Men" franchise, shares stories from his childhood and career in the Broadway show. He also incorporates anecdotes that feature his wife, Deborra-Lee Furness, and their two children, Oscar, 11, and Ava, 6. According to Jackman, they also happen to be his toughest critics.

"I said, 'Guys, I want you to be really honest. My feelings won't be hurt. You can say whatever, but I just want to know if you like the show or not. Do you enjoy it?'" Jackman recalled. "And my son goes, 'You know, Dad, I really like it.'"